Rotary pump



F. F. AMBROSE.

ROTARY PUMP.

APPLICATION FILED FEB. 24, 191.9. 1,390,744. at t dSept- 13,1921.

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INVENTOR M 4% BY I ii .4 4

ATTORNEY F. F. AMBROSE.

ROTARY PUMP. APPLICATION FILED FEB.24,1919.

A ITO/WE V 2 SHEETS-SHEET 2- Patented Sept. 13, 1921.

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UNITED STATES PATENT OFFICE.

FRANK I. AMBROSE, OF LOS ANGELES, CALIFORNIA, ASS IGNOR TO UNION STEAM PUMP COMTANY, 0F BATTLE CREEK, MICHIGAN, A CORPORATION.

ROTARY PUMP.

Specification of Letters Patent. Patented S pt, 13 1921 Application filed February 24, 1919. Serial No. 278,726.

To all whom it may concern:

Be it known that I, FRANK F. AMBROSE, a citizen of the United States, residin at the city of Los Angeles, county of Los ngeles, State of Cal, have invented new and useful Improvements in Rotary' Pumps, of which the following is a specification.

My inventlon relates tothat class of r0- tary pumps in which pistons are operated by a rotor in which they reciprocate; and

I the objects thereof are to prevent wear on the interior of the pump chamber casing and on the edges of the piston blades. A further object is to construct a pump of few parts in which the internal parts can be inspected or moved easily. A further object isto dispense with cams to cause the reciprocation of the piston blades.

In the drawings forming part of this application Figure 1 is a vertical cross section of the preferred form of pump on the line 11 of Fig.2.

Fig. 2 is a longitudinal section on the line 2-2 of Fig. 1. Fig. 3 is anend View of a iston. Fig 4 is an edge view of a four lade piston detached. Fig. 5- is an edge view of one of the piston blades shown in edge view in Fig. 4. Fig.1 is a vertical longitudinal section of a modified form of pump on the line '1-'-1' of Fig. 2. Fig. 2 is a cross section onthe line 2--"* of Fig 1. Fig. 3 is a cross section onthe line 33 of Fig. 1 with the case omitted. Fig. 4 is a perspective view of the piston of Fig. 1. Fig. 5 is a perspective view of a wearing plate.

In the drawings 10 is the base plate which is secured to the floor'll of the place of The body 12 of the pump chamber casing has legs 13 which are bolted to plate 10. Head 14 is remov-ably secured to the body by bolts 15 so that by removing them the head can be taken off and the working parts removed for repairs or replacement. Head 16 is preferably cast integral with the body and is provided with a boss 17 which is eccentric to the center of the head. This boss is centrally bored to receive shaft 21. Rotor 19 is eccentrically mounted in chamher 20 and is secured. to and rotates with said shaft. Shaft 21' is revolubly mounted in standards 22 secured to plate 10 and suitable power is applied to rotate the same when the pump is operated. The outer shell of rotor 19 extends through the length of and with said hub form a piston. Blades 30 a and 31 are connected by a like hub34 and form a plston. It will be observed that hub 34 1s at one end of the blades and hub 33 l1es ust within hub 34 when the pistons are assembled and the blades attached to hub 34 are notched for the reception of hub 33, and the blades attached to hub 33 are notched at the ends for the reception of hub 34. The other ends of the blades are also notched. Within hubs 33 and 34 the blades of both pistons are provided with guide lugs 28, 29, 30 and 31 and the faces of the opposed lugs he in parallel planes and are provided wlth wearing plates 37. I have shown the blades and hubs and lugs integral but it is replaced when worn. In the outer end of,

shaft 35 I provide a grease cup 38 from whlch channel 39 extends to its connection with cross channels 40. Channels 40 terminate in an annular groove 49 in block 36.

From groove 19 channels 41 extend to each plate 37 to lubricate the same. While I have shown the shell of the rotor connected to the hub thereof at one end of the pumping chamber it is obvious that such connection could be made nearer the center and in engagement with the guide lugs. In such case the blades of the pistons would not be notched at that end. Body 12 is provided with inlet port 42 and outlet port 43.

In my modified form I use only one pair of blades, i4 and d5 which are connected by a box shaped hub 46 and -form the piston. I prefer to use guide blocks 47 and 48 at the ends of the hubs, but could use one block in the center and uselugs on the blades and another form of hollow hub.

By this construction it will be seen that I have reduced the number of parts usual 11o .hollow hu in rotary pumps and have dispensed with t e usual cams which cause the reciprocation of the blades of this class of pumps.

Having described my invention I claim- 1. In a rotary pump of the class described, a casing having an annular pumping chamber therein provided with inlet and outlet ports; a driven shaft eccentrically mounted 1n one of the heads of said chamber; a rotor in said chamber secured to said shaft, said rotor having slots therein; a plurality of pistons in said chamber, each piston comprising a pair of blades connected by a hollow hub and mounted to have the blades reci rocate in the slots of the rotor; a guide sha t mounted in the other head of said casing concentricallythereto; lugs secured to said blades with their opposed faces parallel; and a uide block revolubly mounted on said gui e shaft in engagement with said lugs to ide said pistons and prevent the edges 0 with the casing, saidguide block contacting with said blades at the centers of said blades.

In a pump of the class described, a casing having anannular pumping chamber therem provided with an inlet and an outlet port; a driven shaft eccentrically mounted in one of the heads of said casing; arotor in said chamber secured to said shaft,

said rotor having slots therein; a piston comprisin a pair of blades connected by a mounted to have the blades reciprocated in said slots; a guide shaft concentrically mounted in the other head of said casing and extending into said chamber; and a guide block revolubly mounted on said guide-shaft to guide said piston the blades from contactingand prevent the edges of the blades from contacting with said casing, said guide block contacting with said blades at the centers of said blades. v

3. In a rotary pump of the class described a casing having an inlet and an outlet port; a piston having a box-shaped hub in said casing; a rotor to operate said piston; means to operate said rotor; a guide block to guide said piston; and a shaft to position said block, said last shaft being concentric and the rotor shaft being eccentric to the casing heads, said block being square and revolubly mounted on said shaft.

4. In a pump of the class described a casing having an annular pumping chamber provided with an inlet and an outlet port; a driven shaft eccentrically mounted in one of the casin heads and extending to near the center 0 the pumping chamber; a rotor in said chamber secured to said shaft and contacting with the perimeter of said chamber casing between said ports, said rotor having radial slots therein; a piston comprising a pair of blades connected by a hub aving an opening at the center; a guide shaft concentrically mounted in the other head'of said casing and extending to the driven shaft; a square guide block concentrically and revolubly mounted on said guide shaft at the center of the pumping chamber and adapted to contact with the inner edges of said blades and guide them as the rotor is revolved.

In, witness that I claim the foregoing I have hereunto subscribed my name this 28th day of January 1919.

FRANK F. AMBROSE. 

